Concept explainers
There is considerable evidence to support the theory that for some species there is a minimum population m such that the species will become extinct if the size of the population falls below m. This condition can be incorporated into the logistic equation by introducing the factor
Thus the modified logistic model is given by the
(a) Use the differential equation to show that any solution is increasing if
(b) For the case where
(c) Solve the differential equation explicitly, either by using partial fractions or with a computer algebra system. Use the initial population
(d) Use the solution in part (c) to show that if
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Calculus (MindTap Course List)
- Calculus For The Life SciencesCalculusISBN:9780321964038Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.Publisher:Pearson Addison Wesley,